<template>
<div class="list" ref="wrapper">
<div>
<div class="area">
<div class="title">当前城市</div>
<div class="button-list">
<div class="button-wrapper">
<div class="button">{{this.currentCity}}</div>
</div>
</div>
</div>
<div class="area">
<div class="title">热门城市</div>
<div class="button-list">
<div class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
<div class="button">{{item.name}}</div>
</div>
</div>
</div>
<div class="area" v-for="(item, key) of cities" :key="key" :ref="key" >
<div class="title border-topbottom">{{key}}</div>
<div class="item-list">
<div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
</div>
</div>
</div>
</div>
</template>
<script>
import { mapState, mapMutations } from 'vuex'
import Bscroll from 'better-scroll'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  }
}
</script>
<style lang="stylus" scoped>
@import '~style/varibles.styl'
.border-topbottom
  &:before
    border-color: #ccc
  &:after
    border-color: #ccc
.border-bottom
  &:before
    border-color: #ccc
.list
 overflow: hidden
 position: absolute
 top: 1.58rem
 left: 0
 right: 0
 bottom: 0
.title
  line-height: .54rem
  background: #eee
  padding-left: .2rem
  color: #666
  font-size: .26rem
.button-list
  overflow: hidden
  padding: .1rem .6rem .1rem .1rem
  .button-wrapper
    float: left
    width: 33.33%
    .button
      margin: .1rem
      padding: .1rem 0
      text-align: center
      border: .02rem solid #ccc
      border-radius: .06rem
.item-list
  .item
    line-height: .76rem
    padding-left: .2rem
</style>
